Annoyingly, it's unlikely the FAA will let them more than 400' above the terrain because that would mean getting them involved in ATC operations.
However, the FAA has been working on a ID system for drones which seems to be much like the IDENT system for aircraft.
Factoid: in most of Los Angeles there are only two places you can legally fly a drone, both are for model aircraft flyers. Everywhere else you either too close to an airport or in a protected area like the beach or Santa Monica Mountains or both.
Biting the hand that feeds IT
